Platypus (image) CSIRO Australia Share Print E-Mail Caption The platypus belongs to the monotreme family, a small group of mammals that lay eggs and produce milk to feed their young. Credit Laura Romin and Larry Dalton. Usage Restrictions Credit: Laura Romin and Larry Dalton. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.